add failing tests for nested signature help

Author: zth

analysis/tests/src/SignatureHelp.res

@@ -68,3 +68,9 @@ let fn = (age: int, name: string, year: int) => {
 
 // let _ = fn(12, "hello", )
 //                        ^she
+
+// let _ = fn({ iAmSoSpecial() })
+//                           ^she
+
+// let _ = fn({ iAmSoSpecial({ someFunc() }) })
+//                                      ^she

analysis/tests/src/expected/SignatureHelp.res.txt

@@ -266,3 +266,37 @@ extracted params:
   "activeParameter": 2
 }
 
+Signature help src/SignatureHelp.res 71:29
+posCursor:[71:13] posNoWhite:[71:12] Found expr:[71:11->71:33]
+Pexp_apply ...[71:11->71:13] (...[71:16->71:30])
+posCursor:[71:13] posNoWhite:[71:12] Found expr:[71:11->71:13]
+Pexp_ident fn:[71:11->71:13]
+argAtCursor: unlabelled<0>
+extracted params: 
+[(int, string, int]
+{
+  "signatures": [{
+    "label": "(int, string, int) => unit",
+    "parameters": [{"label": [0, 4], "documentation": {"kind": "markdown", "value": "```rescript\nint\n```"}}, {"label": [6, 12], "documentation": {"kind": "markdown", "value": "```rescript\nint\n```"}}, {"label": [14, 17], "documentation": {"kind": "markdown", "value": "```rescript\nint\n```"}}]
+  }],
+  "activeSignature": 0,
+  "activeParameter": 0
+}
+
+Signature help src/SignatureHelp.res 74:40
+posCursor:[74:13] posNoWhite:[74:12] Found expr:[74:11->74:47]
+Pexp_apply ...[74:11->74:13] (...[74:16->74:44])
+posCursor:[74:13] posNoWhite:[74:12] Found expr:[74:11->74:13]
+Pexp_ident fn:[74:11->74:13]
+argAtCursor: unlabelled<0>
+extracted params: 
+[(int, string, int]
+{
+  "signatures": [{
+    "label": "(int, string, int) => unit",
+    "parameters": [{"label": [0, 4], "documentation": {"kind": "markdown", "value": "```rescript\nint\n```"}}, {"label": [6, 12], "documentation": {"kind": "markdown", "value": "```rescript\nint\n```"}}, {"label": [14, 17], "documentation": {"kind": "markdown", "value": "```rescript\nint\n```"}}]
+  }],
+  "activeSignature": 0,
+  "activeParameter": 0
+}
+